Spring-beam for car-trucks.



No. 826,653 PATBNTED JULY 24, 1906.

v. E. I. DODDS.

7 SPRING BEAM FOR GAR TRUCKS.

APPLICATION FILED SEPT. 11.1906.

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I I Q PATENTBD JULY 24, 1906.

E. I. nonns. SPRING BEAM FOR GAR TRUCKS;

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APPLICATION TILED SEPT.11,1906.

- UNITED STATES PATENT oinnon.

ETHAN I. DODDS,'OF PULLMAN', ILLINOIS, ASSIGNOR o THE PULLMAN COMPANY, O CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SPRING-BEAM FOR CAR-TRUCKS.

Patented July 24, 1906.

To all whom itmaty concern:

Be it known that I, ETHAN I. Donns, a citizen of the United States residing at Pullman, in the county of Cook and State of Illi nois, have invented certain new and useful Improvements in Spring-Beams for Car- Trucks, of which the following is a specification.

My invention involves the employment of hollow metallic spring beams or bolsters in railway-car trucks, the same being built up of standard rolled or pressed bars properly spaced apart and secured together.

In the accompanying. drawings I have illustrated two embodiments of my invention, like reference characters in all the views applying to the same parts. 7

Figure 1 is a plan view of two spring-beams oined together by the center-bearing archars. Fig. 2 is an end elevation of, the structure illustrated in Fig. 1'. 3 is a vertical cross-section of a truck, showing my improved spring-beam in elevation. Fig. 4 is an end view of the s ring-beam shown in Fig. 3 and Figs. 5 an 6 are similar to Figs. 3 and 4, but include some modifications in the spring-beam.

Referring first to Fig. 1 two spring beams or bolsters 10 10 are tied together near their central portions b center-bearin arch-bars 11 11 and cneterearing inverted arch-bars 12,- the two pairs of bars supporting a centerbearing'beam 13'. Each spring-beam comprises two outside spaced chaImel-bars 14 14, which are disposed with their flanges extended toward each other, the bars being of such a length that they will fit between the usual wheel-pieces 15, as shown in Fig. 3. Within the trough of each channel-bar '14 is a smaller longitudinally-dis osed channelbar 15, whose ends pro ect e ond those of the bars 14, as is illustrated in igs. 1 and 3,

the webs of bars 15 being riveted'to the webs of bars 14, and the lower flanges of bars 15 being secured to the lower flanges of bars 14 and to a bottomtension-plate 16. To space apart the upper portions of the bars 14, I provide two dish-shaped spacing members 17, and between the lower surfaces of these spacing members and the upper surface of t e tension-bar 16 I provide a central longitudinal I-beam 18, which projects beyond the channels 14 and is of the same length as bars 15. The flanges of the spacing meme comparatively small partof the we1 hers 17 are riveted to the upper flan es of the bars 15 and 18 and to the upper anges of bars 14 and to a top compression-plate 19. Elliptic bolSter-sprin s 20 are interposed between the outer ends of bars 14 and the usual spring-plank 21, andto the outer ends of bars 15 and 18 are secured side bearingblocks' 22, to whose u per surfaces are attached side bearingridges 23. It will thus be apparent that the weight of the car is transmitted through the members 11 and 12 and under some circumstances through parts 23 and 22 to the spring beams or bolsters 10 10, being thence transmitted through s rings 20 and spring-plank 21, which latter epends in the usual manner from the truckframe, while the weight of the truck-frame and the pressure transmitted to it is sus-- tained by spiral springs 24, resting upon the usual equalizing-bars 25, whereby the Weight of the car an truck-frame is equally istributed on the 'ournal-boxes. (Not shown.) In the modi cation illustrated in Figs. 5 and 6 I dispense with the top compressionplate 19, and on the lower side of the beam I providein addition to the tension-plate 16 castings 26, which act as struts for tensionrods 27, secured at their ends 28 to the under side of the beam or bolster. I also emplo additional's acing members 29 between I beam 18 and the channels 15, these spacing members being placed at the outer ends of beams 15 and 18 and having their flanges riveted to these beams, as illustrated in Fig. 6. .It will be apparent that my improved spring-beam is .proportioned to most successfully withstand the strains to which it may be sub 'ected with the employment of. a minimum 0 metal. The central part of the beam on which the whole weight of the car is ordinaril thrust is composed of heavy beams, while the ends-which only carry a ht of the car when the body thereof is tip so as to rest on one of the side bearing liridges, are made u of small beams or bars.

To those skilled in the art various'mechanical changes in in construction will suggest themselves, an it should be. understood that my invention is not limited to the details shown and described, except to the extent to which they are made the subjectmatter of specific claims.

This patent is intended to embrace only so much of the disclosure made herein as is covered by the claims.

I claim-" 1. A spring-beam for a railway-car truck having longitudinal standard beams, and a to compression member secured thereto, su stantially as described.

2. A spring-beam for a railway-car truck having longitudinal standard beams, and a bottomtension member secured thereto, substantially as described.

3. A spring beam for a railway-car truck having longitudinal standard beams, one or more struts fastened to said beams, and one or more tension-bars fastened to said beams and cooperating with said struts, substantially as described.

. 4. In a s ring-beam for railway-car trucks, the combination of longitudinal beams spaced apart, and longer longitudinal beams secured to said first-mentioned beams, the ends of said longer beams extending beyond the ends of the shorter beams, substantially.

as described.

5. In a spring beam for railway-car trucks the combination of parallel stan ard beams, one or more spacers for said be ms, longer standard beams secured to and projecting beyond the ends of. said beams, and one or.

more spacers for said longer beams, substantially as described.

6. In a spring-beam for railway-car trucks,

1 the combination of longitudinal spaced channel beams, and longer longitudinal channelbeams secured thereto and projecting beyond the ends thereof, substantially as described.

7. In a spring-beam for railway-car trucks, the combination of arallel channel-beams, one or more spacers for said beams, longer channel-beams secured to said parallel channel beams and projecting beyond the ends thereof, and one or 'more spacers for said longer beams, substantially as described.

8. In a spring-beam for railway-car trucks,

the combination of longitudinal standard beams spaced apart, longer standard beams secured thereto andprojectin beyond the ends thereof, a centra lo ngitu inal standard beam, and means to tie said beams together, substantially as described. Y

9. In a spring-beam for railway-car trucks, the combination of spaced standard beams, three standard beams smaller in cross-section than the first-mentioned beams and disposed between the latter, one or more spacers to hold said smaller'beams in place, and a bottom plate secured to all of said beams, substantially as described.

- 10. In a spring-beam for railway-car trucks, the combination of spaced channelbeams, longer channel-beams secured to said spaced channel-beams and projecting" beyond the ends thereof, a center I-beam, and a bottom plate secured to said I-beam and to said channel-beams, substantially as described.

11. In a spring-beam for railway-car trucks, the combination of spaced channelbeams disposed with their flanges toward each other, one or more spacers for said channels, longer channels fastened to. said first-named channels and projecting beyond the ends thereof with then flan es disposed toward each other, a center -beam, and

. one or more spacers for said I-beam and longer channels, substantiall as described.-

1 2., In a construction of t e character described, the combination of a glurality of standard beams, longer standar beams secured thereto and projecting beyond the ends thereof, one or more center-bearing arch-bars secured to said first-mentioned standard beams, and side bearing-bridges secured to the projecting ends of said longer standard beams, substantiall as described.

ETHA I. DODDS. Witnesses:

Fnnnnmcx O. Goonwm, WALTER M. FULLER. 

